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Sistema biológico de aumento da taxa de prenhez. Embriões partenogenéticos podem ajudar o reconhecimento materno da gestação; Biological system to increase pregnancy rate. Parthenogenetic embryos can help the maternal recognition of the gestation

Almeida, Alexandre Barreto de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 12/08/2008 PT
Relevância na Pesquisa
56.19%
Um dos objetivos deste trabalho foi avaliar e comparar a taxa de prenhez de receptoras bovinas nulíparas, após transferência de embriões fecundados in vitro ou in vivo, associados ou não a um embrião partenogenético. Um total de 239 novilhas foram utilizadas, e as médias das taxas de prenhez aos 30 (TP30d) e 60 dias (TP 60d), foram comparadas em arranjo fatorial 8x2 entre G1 e G2 (fecundados in vitro), e em análise fatorial 3x2, entre G3 e G4 (fecundados in vivo). O delineamento utilizado foi: G1) transferência de 1 embrião fecundado in vitro (n=86); G2) transferência de 1 embrião partenogenético associado a 1 embrião fecundado in vitro (n=81); G3) transferência de 1 embrião fecundado in vivo (n=36) e G4) transferência de 1 embrião partenogenético associado a 1 embrião fecundado in vivo (n=36). A taxa de prenhez aos 30 dias para o G1 foi de 31,3% (27/86) e do G2 de 37,0% (30/81); P= 0,28. Para o G3, de 55,5% (20/36) e G4, de 75,0% (27/36); P=0,09. Não houve diferença (P=0,92) para taxa de prenhez aos 60 dias para o G1 em relação ao G2, com taxas de 24,6% (22/86) e 28,2% (23/81); respectivamente. Também não houve diferença (P=0,08) aos 60 dias para o grupo G3 em relação ao G4, com taxas de 44,4 % (16/36) e 61...

Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse; Use of reproductive protocols in Santa Inês ewes on estrus synchronization, mean time to onset of estrus and pregnancy rate by fixed-time artificial insemination or rebreeding

Biehl, Marcos Vinicius
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 03/07/2009 PT
Relevância na Pesquisa
46.21%
Na década de 60, começaram a ser utilizadas técnicas e sincronização do estro, e durante os últimos trinta anos tem sido despertado o interesse do desenvolvimento de métodos para sincronizar o estro de ovelhas. Na maioria das vezes a IA está associada à um protocolo de sincronização do estro podendo assim ser realizada a Inseminação Artificial em Tempo Fixo (IATF). Três experimentos foram realizados com objetivo de avaliar a influência do efeito macho e tipos de rufião, reutilização do dispositivo e o método de inseminação utilizado, na sincronização do estro através do uso de dispositivos intra-vaginais (CIDR®- Control Internal Drog Release), associado com a aplicação intramuscular de eCG e PGF2 , sobre a taxa detecção e tempo médio para aparecimento do estro, taxa de prenhez na IATF e no primeiro estro após a sincronização. Exp. I: Foram utilizadas 270 ovelhas, separadas em três tratamentos: SM = (controle) sem rufiões; DL= recebeu rufiões com Desvio lateral peniano e o VS= recebeu rufiões vasectomizados. Os tratamentos foram submetidos ao mesmo protocolo, CIDR® por 7d, aplicação de 300UI de eCG e 6,71 mg de Dinoprost trometamina, na retirada do CIDR. As ovelhas foram submetidas a IATF pelo método transcervical em 55h após a retirada do CIDR. EXP.II: Foram utilizadas 275 ovelhas...

Períodos de parição e taxa de prenhez em vacas de corte; Calving periods and pregnancy rate in beef cattle

Reinher, Cristiane
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
46.22%
O presente trabalho contextualiza a importância dos efeitos do histograma de partos (HP) e da subépoca de parição (SP) sobre o desempenho reprodutivo de vacas de corte. O primeiro trabalho avaliou o efeito do histograma de parição sobre a taxa de prenhez (TP) de 1.314 vacas de corte primíparas e 4.519 multíparas Hereford em campo nativo de uma criação comercial, no período de 1997 a 2004. As taxas de prenhez foram analisadas pelo método estatístico Quiquadrado. Houve efeito significativo (P<0,05) entre os anos em relação à TP. Os HP do rebanho avaliado estão distantes do modelo ideal. A ocorrência de limitações climáticas no acasalamento diminuiu a taxa de prenhez, contudo o efeito foi de menor magnitude quando o HP foi mais concentrado nos primeiros 42 dias. As vacas primíparas apresentaram histogramas com grande concentração de partos no início da estação, e foram menos sensíveis às adversidades climáticas do que as multíparas. O segundo trabalho analisou o efeito da subépoca de parição sobre a taxa de prenhez de 7.726 vacas de corte multíparas Hereford mantidas em campo natural no Sul do Brasil, entre os anos 1994 e 2007. As subépocas foram divididas em intervalos de 20 dias: de 12 a 31 de agosto (S1)...

Controle do ciclo estral e taxa de prenhez em matrizes de corte bovinas: efeitos hormonais, genéticos e ambientais; Control of the estrous cycle and pregnancy rate in beef cattle cows and heifers: effects hormonal, genetic and environmental

Gottschall, Carlos Santos
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
46.28%
Investigou-se o desempenho reprodutivo de novilhas e vacas de corte submetidas a protocolos de sincronização de estros para a inseminação artificial e a associação entre marcadores moleculares e desempenho reprodutivo. Exp.1 avaliou-se a antecipação da aplicação da PGF2a em programa de IATF com implante de progesterona em 306 vacas Angus, com cria ao pé. A antecipação da aplicação da PGF2a afetou a taxa de concepção à IATF e prenhez final (P<0,05), respectivamente de 60,9% e 89,1% quando comparados a PGF2a na retirada do dispositivo, respectivamente de 49,3% e 76,7%. Exp.2 avaliaram-se os efeitos do GnRH e da manifestação de estro sobre o desempenho reprodutivo em 197 vacas Angus submetidas à IATF. A manifestação de estro antes da IATF influenciou a taxa de prenhez à IATF (TxPIATF) e prenhez final, respectivamente de 46,6%, 78,6% (C/estro) e 33,0%, 60,6% (S/estro) (P<0,05). O GnRH no momento da IATF resultou em menor taxa de prenhez à IATF, 32,3%, comparado a ausência de GnRH 48,0% (P<0,05), mas não afetou a prenhez final, respectivamente de 69,7% e 70,4%. Houve interação entre estro e GnRH. Vacas C/estro-C/GnRH tiveram 31,4% de prenhez à IATF contra vacas C/estro- S/GnRH com 61,5% (P<0,05). Nas vacas sem estro...

Ganho de peso na recria e desempenho reprodutivo de novilhas acasaladas com sobreano

Montanholi, Yuri Regis; Barcellos, Julio Otavio Jardim; Borges, Joao Batista Souza; Costa, Eduardo Castro da; Wunsch, Carolina; Prates, Enio Rosa
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: application/pdf
POR
Relevância na Pesquisa
46.17%
O objetivo deste trabalho foi avaliar os efeitos da intensidade do ganho de peso no período de recria, dos 13 aos 18 meses de idade, sobre a taxa de prenhez de novilhas de corte acasaladas com o sobreano durante o outono. Os tratamentos foram constituídos de 30 novilhas com peso médio de 208 kg, submetidas a ganho médio de 0,595 kg dia-1 (G600), 41 novilhas com peso médio de 197 kg submetidas a ganho médio de 0,656 kg dia-1 (G700) e 58 novilhas com peso médio de 181 kg submetidas a ganho médio de 0,723 kg dia-1 (G800). Foram avaliados os efeitos dos tratamentos sobre peso, escore de trato reprodutivo e taxa de prenhez. As taxas de prenhez foram 30,0% 47,8% e 50,0% para os grupos G600, G700 e G800, respectivamente, não existindo diferença significativa entre os grupos. Os grupos G700 e G800, submetidos à maior taxa de ganho de peso, apresentaram maiores valores de escore de trato reprodutivo em relação ao G600 no início da estação de monta. Novilhas com escores mais elevados apresentaram tendência a maior taxa de prenhez. A taxa de prenhez esteve associada à intensidade de ganho de peso na recria independentemente das variações de peso no acasalamento.; The objective of this work was to evaluate the effects of growth rate during rearing period...

Synchronization rate, size of the ovulatory follicle, and pregnancy rate after synchronization of ovulation beginning on different days of the estrous cycle in lactating dairy cows

Vasconcelos, JLM; Silcox, R. W.; Rosa, GJM; Pursley, JR; Wiltbank, M. C.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 1067-1078
ENG
Relevância na Pesquisa
66.13%
Recently a protocol was developed that precisely synchronizes the time of ovulation in lactating dairy cows (Ovsynch; GnRH-7d-PGF(2 alpha)-2d-GnRH). We evaluated whether initiation of Ovsynch on different days of the estrous cycle altered the effectiveness of this protocol. The percentage of cows (n=156) ovulating to the first GnRH was 64% and varied (P<0.01) by stage of estrous cycle. Treatment with PGF(2 alpha) was effective, with 93% of cows having low progesterone at second GnRH. The overall percentage of cows that ovulated after second GnRH (synchronization rate) was 87% and varied by response to first GnRH (92% if ovulation to first GnRH vs 79% if no ovulation; P<0.05). There were 6% of cows that ovulated before the second injection of GnRH and 7% with no detectable ovulation by 48 h after second GnRH. Maximal diameter of the ovulatory follicle varied by stage of estrous cycle, with cows in which Ovsynch was initiated at midcycle having the smallest follicles. In addition, milk production and serum progesterone concentration on the day of PGF(2 alpha) affected (P<0.05) size of the ovulatory follicle. Using these results we analyzed pregnancy rate at Days 28 and 98 after Al for cows (n=404) in which Ovsynch was initiated on known days of the estrous cycle. Pregnancy rate was lower for cows expected to ovulate larger follicles than those expected to ovulate smaller follicles (P<0.05; 32 vs 42%). Thus...

Effects of timing of induced luteolysis in embryo donor mares on reproductive performance and pregnancy rate in recipient mares

Goretti, R. G.; Araujo, R. R.; Rocha Filho, A. N.; Araujo, G. H. M.; Lopes, E. P.; Guimaraes, J. D.
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 1170-1174
ENG
Relevância na Pesquisa
66.13%
The objective was to evaluate the effects of giving prostaglandin F(2 alpha) (PGF) to donor mares 48 h prior to embryo collection. Non-lactating donor mares (n = 20 estrous cycles in 10 mares), ranging from 2.5 to 10 y of age and 400 to 500 kg of body weight were used from September 2004 to February 2005 in the southern hemisphere (Brazil). Donor mares were randomly assigned in a cross-over design study. During a Treated cycle, 7.5 mg PGF was given 48 h prior to embryo collection, whereas in the Control cycle, 7.5 mg PGF was given at embryo collection. In Treated Cycles, serum progesterone concentrations decreased between the day of PGF treatment and the day of embryo collection (13.9 +/- 5.4 and 0.5 +/- 0.3 ng/mL, respectively; P < 0.05). In Treated versus Control cycles, the interovulatory interval was shorter (14.9 +/- 0.9 vs 17.5 +/- 1.1 d, P < 0.05). However, there was no significant difference between these groups for the interval from PGF to ovulation (average, 9.8 d), embryo recovery rate (average, 75%), embryo quality, uterine protein concentration, and pregnancy rate in recipient mares (average, 87% at 15 d after ovulation, with no pregnancy loss detected by 60 d). In conclusion, giving donor mares PGF 48 h prior to embryo collection reduced the average interovulatory interval by approximately 2.5 d...

The effect of follicle age on pregnancy rate in beef cows

Abreu, F. M.; Geary, T. W.; Cruppe, L. H.; Madsen, C. A.; Jinks, E. M.; Pohler, K. G.; Vasconcelos, J. L. M.; Day, M. L.
Fonte: Amer Soc Animal Science Publicador: Amer Soc Animal Science
Tipo: Artigo de Revista Científica Formato: 1015-1021
ENG
Relevância na Pesquisa
66.16%
The effect of the age of the ovulatory follicle on fertility in beef cows was investigated. Multiparous (n = 171) and primiparous (n = 129) postpartum beef cows in 2 groups (G1 and G2) received estradiol benzoate (EB; 1 mg/500 kg BW, intramuscular [i.m.]) 5.5 d (G1; n = 162) and 6.5 d (G2; n = 138) after the final GnRH of a synchronization program (5d CO-Synch + CIDR) to induce emergence of a new follicular wave (NFW), followed by prostaglandin F2 alpha (PGF2 alpha; 25 mg, i.m.) administration either 5.5 d (young follicle, YF; n = 155) or 9.5 d (mature follicle, MF; n = 145) after EB. Estrous detection coupled with AI 12 h later (estrus-AI) was performed for 60 h (MF) and 84 h (YF) after PGF(2 alpha); cows not detected in estrus within this period received timed AI (TAI) coupled with GnRH at 72 and 96 h, respectively. Within the first 72 h after PGF(2 alpha), more (P < 0.01) cows in the MF (76.3%) than YF treatment (47.7%) exhibited estrus, but through 96 h, the proportion detected in estrus (P < 0.05) and interval from PGF(2 alpha) to estrus (P < 0.01) were greater in the YF than MF treatment (88.6% vs. 76.3%, 78.9 +/- 0.8 vs. 57.5 +/- 1.6 h, respectively). Age of the ovulatory follicle at AI was greater (P < 0.01) in the MF (9.32 +/- 0.04 d) than YF (6.26 +/- 0.02 d) treatment...

Association between Plasma and Milk Urea on the Insemination Day and Pregnancy Rate in Early Lactation Dairy Cows

Chaveiro, António E.; Andrade, M.; Borba, Alfredo Emílio Silveira de; Silva, Joaquim Fernando Moreira da
Fonte: Global Researchers Journals Publicador: Global Researchers Journals
Tipo: Artigo de Revista Científica
Publicado em /12/2011 ENG
Relevância na Pesquisa
66.06%
Lactatingdairy cows (n=177) feed with grass and corn silage ad libitum kept in pasture, were randomly assigned to evaluate how urea nitrogen in plasma and milk can be related to their pregnancy rate. Blood and milk samples were collected on the artificial insemination (AI) day to evaluate plasma urea nitrogen (PUN) and milk urea nitrogen (MUN) as well as progesterone levels, excluding cows with progesterone higher than 0.5 ng/ml. Cows were considered pregnant if six weeks after artificial insemination, they did not return to estrus.Concentrations of PUN or MUN greater than the average (16 mg/dl) were associated with decreased pregnancy rates (13% and 14%, respectively) (p< 0.05) as compared to the cows with urea levels less than this value on the insemination day. As PUN and MUN increased to greater than 16 mg/dl, the likelihood ratio for pregnancy decreased. There was a high correlation between PUN and MUN concentrations (r²= 0.97, p≤ 0.001). The results of this study indicate that an increase in PUN or MUN can exert director indirect effects in reproduction, impairing the conception of grazing dairy cows.

Probability of pregnancy in beef heifers

Faria,D.P.; Costa,M.D. da; Raidan,F.S.S.; Ruas,J.R.M.; Júnior,V.R.R.; Toral,F.L.B.; Aspiazú,I.
Fonte: Universidade Federal de Minas Gerais, Escola de Veterinária Publicador: Universidade Federal de Minas Gerais, Escola de Veterinária
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2014 EN
Relevância na Pesquisa
56.08%
This study aimed to evaluate the influence of initial weight, initial age, average daily gain in initial weight, average daily gain in total weight and genetic group on the probability of pregnancy in primiparous females of the Nellore, 1/2 Simmental + 1/2 Nellore, and 3/4 Nellore + 1/4 Simmental genetic groups. Data were collected from the livestock file of the Farpal Farm, located in the municipality of Jaíba, Minas Gerais State, Brazil. The pregnancy diagnosis results (success = 1 and failure = 0) were used to determine the probability of pregnancy that was modeled using logistic regression by the Proc Logistic procedure available on SAS (Statistical..., 2004) software, from the regressor variables initial weight, average daily gain in initial weight, average daily gain in total weight, and genetic group. Initial weight (IW) was the most important variable in the probability of pregnancy in heifers, and 1-kg increments in IW allowed for increases of 5.8, 9.8 and 3.4% in the probability of pregnancy in Nellore, 1/2 Simmental + 1/2 Nellore and, 3/4 Nellore + 1/4 Simmental heifers, respectively. The initial age influenced the probability of pregnancy in Nellore heifers. From the estimates of the effects of each variable it was possible to determine the minimum initial weights for each genetic group. This information can be used to monitor the development of heifers until the breeding season and increase the pregnancy rate.

Does the duration of infertility affect semen parameters and pregnancy rate after varicocelectomy?: a retrospective study

Al-Ghazo,Mohammed A.; Ghalayini,Ibrahim Fathi; Al-Azab,Rami S; Bani-Hani,Ibrahim; Daradkeh,Mohammad S.
Fonte: Sociedade Brasileira de Urologia Publicador: Sociedade Brasileira de Urologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2011 EN
Relevância na Pesquisa
46.2%
OBJECTIVES: The most common indication for treatment of varicocele is still male subfertility. The aim of this study was to explore the effect of infertility duration on semen parameters and spontaneous pregnancy rate after varicocelectomy. MATERIALS AND METHODS: The medical records of 183 infertile patients with clinical varicocele were retrospectively reviewed. The patients were divided into three groups according to the duration of infertility (group I, 1-3 years, group II, 3-6 years and group III, > 6 years). Total sperm motility counts (TMCs) before and after varicocelectomy and spontaneous pregnancy rate among these groups were statistically compared. RESULTS: The greatest changes, regarding preoperative and postoperative TMCs and spontaneous pregnancy rate were noticed between group I and III. Preoperative TMCs in group I and III was 15.2 ± 1.2, 7.8 ± 1.4, respectively (p < 0.05). Postoperative TMCs in group I and III was 33.7 ± 2.5, 25.2 ± 1.9, respectively (p < 0.05). An overall spontaneous pregnancy rate of 34.4% was achieved after inguinal varicocelectomy. The greatest spontaneous pregnancy rate was achieved in Group I (37.3%), and the lowest pregnancy rate in Group III (26.3%) (P < 0.05). CONCLUSIONS: Surgical varicocelectomy improves the total sperm motility counts especially in patients who have a TMCS more than 5 million and improves the spontaneous pregnancy rates. The improvement in the spontaneous pregnancy rates after varicocelectomy correlates negatively with the duration of infertility. Therefore...

Theoretical Model of the Relationship between Single Embryo Transfer Rate and Multiple Pregnancy Rate in Japan

Ooki, Syuichi
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
46.19%
The purpose of the present study was to examine the effect of single embryo transfer (SET) in assisted reproductive technology (ART) on the reduction of the multiple pregnancy rate. We also estimated the monozygotic (MZ) twinning rates according to the SET diffusion indirectly. A reverse sigmoid curve was assumed and examined using nationwide data of SET from 2007 to 2009 in Japan. The multiple pregnancy rate decreased almost linearly where the SET pregnancy rate was between about 40% and 80% of regression approximation. The linear approximation overestimated multiple pregnancy rates in an early period and underestimated multiple pregnancy rates in the final period. The multiple pregnancy rate seemed to be influenced by the improvement of the total pregnancy rate of ART in the early period and by the MZ twinning after SET in the final period. The estimated MZ twinning rate after SET was around 2%.

Influence of Temperature and Humidity on Pregnancy Rate of Murrah Buffaloes under Subtropical Climate

Dash, Soumya; Chakravarty, A. K.; Sah, V.; Jamuna, V.; Behera, R.; Kashyap, N.; Deshmukh, B.
Fonte: Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) Publicador: Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST)
Tipo: Artigo de Revista Científica
Publicado em /07/2015 EN
Relevância na Pesquisa
46.25%
Heat stress has adverse effects on fertility of dairy animals. Decline in fertility is linearly associated with an increase in combination of both temperature and humidity. The purpose of this study was to investigate the relationship between temperature humidity index (THI) and the pregnancy rate of Murrah buffaloes in a subtropical climate. The effects of genetic and non-genetic factors viz., sire, parity, period of calving and age group at first calving were found non-significant on pregnancy rate. The effect of THI was found significant (p<0.001) on pregnancy rate of Murrah buffaloes calved for first time and overall pregnancy rate. The threshold THI affecting the pregnancy rate was identified as THI 75. The months from October to March showed THI<75 and considered as non heat stress zone (NHSZ), while months from April to September were determined as heat stress zone (HSZ) with THI≥75. The lowest overall pregnancy rate (0.25) was obtained in July with THI 80.9, while the highest overall pregnancy rate (0.59) was found in November with THI 66.1. May and June were identified as critical heat stress zone (CHSZ) within the HSZ with maximum decline (−7%) in pregnancy rate with per unit increase in THI. The highest overall pregnancy rate was estimated as 0.45 in NHSZ with THI value 56.7 to 73.2. The pregnancy rate was found to have declined to 0.28 in HSZ with THI 73.5 to 83.7. However...

Teenage Pregnancy and Opportunities in Latin America and the Caribbean : On Teenage Fertility Decisions, Poverty and Economic Achievement

Azevedo, Joao Pedro; Favara, Marta; Haddock, Sarah E.; Lopez-Calva, Luis F.; Muller, Miriam; Perova, Elizaveta
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
EN_US
Relevância na Pesquisa
46.18%
The pregnancy project sought to expose the existence, and challenge the validity, of stereotypes about Hispanic women. The charade explored the underlying motivations of the many who responded with a wide range of reactions. The specific objectives of this regional study are: to establish a thorough description of the magnitude of the issue and its potential implications for social advancement; to advance the understanding of the risk factors, motivations and impacts at the household level-as a determinant of poverty and a cause of intra-and intergenerational poverty traps; to illuminate the coping mechanisms and their individual and social implications; to highlight the gender-related issues that have historically provoked asymmetric costs to boys and girls; and to provide elements that support specific policies on this matter. In the last decade, Latin America and the Caribbean (LAC) have been moving in the right direction and the region has experienced important gains in gender equality of endowments (assets) and economic opportunities. In most LAC countries...

Influence of acupuncture stimulation on pregnancy rates for women undergoing embryo transfer

Smith, C.; Coyle, M.; Norman, R.
Fonte: Elsevier Science Inc Publicador: Elsevier Science Inc
Tipo: Artigo de Revista Científica
Publicado em //2006 EN
Relevância na Pesquisa
56.17%
OBJECTIVE: To evaluate the effects of acupuncture on clinical pregnancy rates for women undergoing ET. DESIGN: Single-blind, randomized controlled trial using a noninvasive sham acupuncture control. SETTING: Repromed, The Reproductive Medicine Unit of The University of Adelaide. PATIENT(S): Women undergoing IVF. INTERVENTION(S): Women were randomly allocated to acupuncture or noninvasive sham acupuncture with the placebo needle. All women received three sessions, the first undertaken on day 9 of stimulating injections, the second before ET, and the third immediately after ET. MAIN OUTCOME MEASURE(S): The primary outcome was pregnancy. Secondary outcomes were implantation, ongoing pregnancy rate at 18 weeks, adverse events, and health status. RESULT(S): Two hundred twenty-eight subjects were randomized. The pregnancy rate was 31% in the acupuncture group and 23% in the control group. For those subjects receiving acupuncture, the odds of achieving a pregnancy were 1.5 higher than for the control group, but the difference did not reach statistical significance. The ongoing pregnancy rate at 18 weeks was higher in the treatment group (28% vs. 18%), but the difference was not statistically significant. CONCLUSION(S): There was no significant difference in the pregnancy rate between groups; however...

The influence of the number of follicles on pregnancy rates in intrauterine insemination with ovarian stimulation: a meta-analysis

van Rumste, M.; Custers, I.; van der Veen, F.; van Wely, M.; Evers, J.; Mol, B.
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
Publicado em //2008 EN
Relevância na Pesquisa
56.18%
BACKGROUND The influence of multifollicular growth on pregnancy rates in subfertile couples undergoing intrauterine insemination (IUI) with controlled ovarian hyperstimulation (COH) remained unclear. METHODS Relevant papers were identified by searching MEDLINE, EMBASE and the Cochrane Library. A meta-analysis was performed and Mantel–Haenszel pooled odd ratios (ORs) and risk differences with 99% confidence intervals (CIs) were calculated to express the relation between the number of follicles and pregnancy rates. RESULTS We included 14 studies reporting on 11 599 cycles. The absolute pregnancy rate was 8.4% for monofollicular and 15% for multifollicular growth. The pooled OR for pregnancy after two follicles as compared with monofollicular growth was 1.6 (99% CI 1.3–2.0), whereas for three and four follicles, this was 2.0 and 2.0, respectively. Compared with monofollicular growth, pregnancy rates increased by 5, 8 and 8% when stimulating two, three and four follicles. The pooled OR for multiple pregnancies after two follicles was 1.7 (99% CI 0.8–3.6), whereas for three and four follicles this was 2.8 and 2.3, respectively. The risk of multiple pregnancies after two, three and four follicles increased by 6, 14 and 10%. The absolute rate of multiple pregnancies was 0.3% after monofollicular and 2.8% after multifollicular growth. CONCLUSIONS Multifollicular growth is associated with increased pregnancy rates in IUI with COH. Since in cycles with three or four follicles the multiple pregnancy rate increased without substantial gain in overall pregnancy rate...

An observational outcomes study from 1966-2008, examining pregnancy and neonatal outcomes from dialysed women using data from the ANZDATA Registry

Shahir, A.; Briggs, N.; Katsoulis, J.; Levidiotis, V.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
46.21%
Aims: To conduct an observational outcomes study examining pregnancy and neonatal outcomes of dialysed women aged 15–49, from 1966–2008, using data from the ANZDATA Registry. Methods: Data from the ANZDATA Registry were captured and analysed from 1966–2008. Specific pregnancy outcomes included: live birth (LB), spontaneous abortion, stillbirth (SB) or termination of pregnancy. Delivery and neonatal outcomes, since 2001, were also analysed. Results: There were 23 700 person-years (PY) of observational data during the study period with 49 pregnancies, of which 30 (79%) resulted in a LB, once terminations were excluded. Pregnancy rates: Overall the pregnancy rate was 2.07 per 1000 PY for the study interval. A significant increase in the pregnancy rate was noted for the 1996–2008 time interval (3.3 per 1000 PY, compared with 0.54 and 0.67 in the eras 1976–1985 and 1986–1995, respectively; P = 0.004). Most pregnancies were observed in the 25–29 age group: 20–24, 25–29 and 30–34 (5.31, 5.61 and 3.87 per 1000 PY, respectively). Patients on peritoneal dialysis were less likely to achieve a pregnancy compared with haemodialysis patients (P < 0.02). Live birth rates: The overall LB rate was 1.26 per 1000 PY. The rate for each of the age brackets was as follows: 3.54 for 20–24...

; A policy pathway to reducing teenage pregnancy in Africa

Odejimi, Opeyemi; Young, Denise Bellingham
Fonte: Universidade de São Paulo. Faculdade de Saúde Pública Publicador: Universidade de São Paulo. Faculdade de Saúde Pública
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/06/2014 ENG
Relevância na Pesquisa
46.22%
; Background: Teenage pregnancy remains an important and complex issue around the world, with reports indicating that Africa has higher rates than other continents. Studies have indicated that social and economic determinants are associated with these higher rates. Therefore this study aims to identify the social and economic influencers of teenage pregnancy which would help develop a best-practice approach to reduce its incidence in Africa. Methods: Data sets from the World Bank Organisation between 2008 and 2010 specific to 51 Africa countries were obtained to conduct this study, based on  availability. Independent t-test, Spearman’s correlation and regression analysis were performed. The eight social and economic variables used in this study are: GDP per capita, GINI index, Female Literacy rate, Health expenditure, Unemployed female rate, Gender equality, Contraceptive prevalence and urban population rate. Results: Independent t-test revealed that in countries where teenage pregnancy rate is high, Literacy rate, contraceptive prevalence rate and Healthcare expenditure rate was low. Spearman correlation indicated that female literacy rate, Healthcare expenditure, GDP per capita and Contraceptive prevalence had a significant inverse relationship with teenage pregnancy rate. Logistic regression indicates that Female Literacy rate is the best predictor of teenage pregnancy in Africa. Conclusion: Result suggest that a practical approach to reduce teenage pregnancy rate in Africa is to implement strategies and policies aimed at improving female literacy rate...

Dinâmica folicular e taxa de prenhez em novilhas receptoras de embrião (Bos taurus indicus x Bos taurus taurus) tratadas com o protocolo "Ovsynch" para inovulação em tempo fixo; Follicular dynamics and pregnancy rate in embryo recipient (Bos taurus indicus x Bos taurus taurus) treated with "Ovsynch" protocol for fixed-time embryo transfer

Baruselli, Pietro Sampaio; Marques, Márcio de Oliveira; Carvalho, Nelcio Antonio Tonizza de; Berber, Rodolfo Cassimiro de Araújo; Valentim, Renato; Carvalho Filho, Ademário Fernandes de; Costa Neto, Waldyr Pinto
Fonte: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia Publicador: Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 01/01/2003 POR
Relevância na Pesquisa
66.05%
Objetivou-se avaliar a eficiência da sincronização da ovulação para inovulação em tempo fixo em novilhas Bos taurus indicus x Bos taurus taurus receptoras de embrião. No Experimento 1, a dinâmica folicular foi acompanhada durante o protocolo "Ovsynch" (G1; n=35) e após a aplicação de PGF2alfa (G2; n=34). No Experimento 2, os mesmos tratamentos foram realizados a campo em 168 (G1) e 177 (G2) novilhas. No D6, colheu-se sangue para dosagem de P4 e se realizaram exames ultra-sonográficos. No D7, realizou-se a inovulação. No Experimento 1, 45,7% dos animais ovularam após o 1º GnRH (P;0,05). Ao final, a taxa de prenhez no Gl foi de 35,7% e no G2 de 25,4% (P<0,05). Foram detectadas em estro 53,7% das novilhas do G2 e 33,3% do Gl (P<0,05). Os corpos lúteos com maior área determinaram maiores concentrações de P4 e taxa de concepção (P<0,05). A sincronização da ovulação para inovulação em tempo fixo aumentou as taxas de ovulação, de aproveitamento e de prenhez em novilhas receptoras de embrião.; The aim of this study was to evaluate the efficacy of the synchronization of ovulation for fixed-time embryo transfer in crossbred recipient heifers (Bos taurus indicus x Bos taurus taurus). At Experiment 1, ovarian ultrasonography was performed to evaluate follicular dynamics during the "Ovsynch" protocol (G1; n=35) or single PGF2alpha injection (G2; n=34). At Experiment 2...

Brief communication: Effect of post-mating progestagen administration on pregnancy rate in crossbred goats following an induced estrus

Nava-Trujillo,Héctor; Chango-Villasmil,José; Finol-Parra,Geovanny; Maldonado-Suárez,Juan; Torres-Rodríguez,Paola; Carrillo-Fernández,Freygelinne; Gil-Huerta,Lidya; González,Noelia
Fonte: UNIVERSIDAD DEL ZULIA Publicador: UNIVERSIDAD DEL ZULIA
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2008 EN
Relevância na Pesquisa
56.15%
Estrus induced with progesterone or progestagens have low fertility compared to natural estrus. However, post-mating progesterone administration has been reported by increases embryo development and pregnancy rate; therefore the aim of this study was to evaluate the effect of post-mating progestagen administration on pregnancy rate after medroxyprogesterone acetate (MAP) induced estrus in crossbred goats. Estrus induction was started at 31.3 ± 1.7 days post-partum with intra- vaginal sponges impregnated with 60 mg of MAP during 14 days and at time of sponge removal were applied 500 IU of eCG intramuscular. Estrus was detected every 6 hours from 24 hours onwards after sponge withdrawal. Goats were naturally mated with two entry bucks. Five days post-mating, mated goats were randomly assorted into two groups, control group (n=18), without any treatment, and MAP group (n=18), receiving a sponge with 60 mg of MAP for fourteen days. Ultrasonographyc diagnosis of pregnancy was performed at day 50 post-mating. MAP treatment, did not affect the pregnancy rate, with 44.4% (8/18) in MAP group, while in control group was 55.5% (10/18), P>0.05. In conclusion, MAP treatment with a sponge impregnated with 60 mg of MAP between days 5 and 19 post-mating did not affect the pregnancy rate after progestagen induced estrus during the early post-partum period in crossbred tropical goats.